I Know That Between The Cam Gear A Crank Gear Put A Striaght Edge On Them And With A Feeler Gauge And See The Clearence. If It To Excessive It Wth Cause Permature Chain Ware Specialy If It's A Roller Cam. I Don't Know The Clearence On Roller Cam Or Flat Tappet But Call Comp Cams They Will Give You Some More Info On This.